Hose fitting



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A. BRUNNER March 14, 1933.

HOSE FITTING Filed March 8, 1930 UNITED STATES ALBERT BBUNNEB, 01' 8'1. LOUIS, HISSOUBIF, ASSIGNOB TO WAGNER ELECTRIC OOBPO- BATIOISLOF ST. LOUIS, MISSOURI, A CORPORATION OF DELAWARE nose rrr'rmc Application filed March 8, 1880. Serial ll'o. 434,198.

M invention relates to a fittin or coupler mem er to be secured to the end a hose embodying rubberor other compressible material, and to the method of securing it to the hose, the object of the invention beingto form, in an economical manner, a connection between a hose and afitting which will be not only mechanically secure but also fluidtight under very high pressure. p

In the accompanying drawing Flgure 1 illustrates, in cross section, the elements of m improved hose fitting as initially formed; Figure 2 illustrates the method and means for permanently securing the parts together; 1 and Figure 3 is a cross-sectional view of the fitting and hose end in their final form. 0

My improved coupler comprises a main fittin member 1 and an unsplit metal sleeve 2. e member 1 comprises a wrench re-- ceiving body portion having a central integral tubular extension 3 and a short outer,

cylindrical, thin-walled extension 4, also integral with said body gortion. The outer end of the member l'maye 'e formed of an externally threaded mem r, as shown, to cooperate with an internally threaded socket in a complementar coupling element, or may be so dimensioned and internally threaded as to receive the end of a complementary coupling element.

The sleeve 2 is provided with internal corrugations or grooves 5 in any suitable man-' ner, and preferably a relatively wide internal groove 6 is formed adjacent to the forwar end of the sleeve to weaken the sleeve at that point.

To assemble the parts, the sleeve is placed over the hose end 7 in the position shown in Figure 1, and then the tubular nipple 3 of the main fitting member is inserted into the bore of the hose and the end of the hose and the end of the sleeve are brought against the side of the body portion of the fitting, the diameter of the sleeve being such that its end fits within the cylindrical extension 4 of the fitting. A two-part reducing die 8 is then placed around the hose, as illustrated in Figure 3, and the sleeve and the end fitting member are forced into the die, which operation reduces the diameter of the sleeve and compresses the resilient material of the hose between the sleeve and the nipple 3. As the parts pass into the die the resilient material of the hose flows forward to such an extent as to cause the portion of the hose m1 terial within the extension 4 to also be under high compression, the contact pressure between the hose and sleeve progressively increasing toward the outer end of the sleeve from a point near its inner end. The final portion of the movement of the fitting into the die bends the cylindrical extension over the forward end of the sleeve, as indicated in Figure 3. The outer end of extension 4 being opposite the weakened portion of the sleeve, that portion bends downwardly, as

indicated, whereby the angle, of the tapered cooperating surfaces of the sleeve and extension to the axis of the fitting, is increased.

By the structure and method of assembling the parts described, the hose material is firmly com ressed between the sleeve and the'central tu ular extension of the fitting body, not only at the reduced portion of the sleeve but between the forward end of the sleeve and 76 said extension -thus forming a firm tapered end portion internally supporting the ta red end portion of the sleeve, whereby the tting member cannot be withdrawn from the hose and sleeve except by such force as would 80 enlarge the diameter of the compressed end of the clamping extension 4.-

Tests of the construction described, and even with hose embodying a braided wire fabric, have demonstrated that longitudinal strains and internal pressure suflicient to break the hose do not produce separation of or leaks at the fitting.

Being aware of the possibility of modifications in the particular structure herein described without departing from the fundamental principles of my invention, I do not intend that its scope be limited except as set forth by the appended claim.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

The combination with a'hose, of a fitting therefor comprising a body portion having a tubular part extending into the hose and an 00 outer annular flange ada ted to surround the hose end, the bore of t e flange being so tapered that its diameter at the outer end is less than its diameter adjacent the body p0rtion of the fitting, a sleeve surrounding the end of the hose and maintainin it in ressure engagement with the perip cry 0 .the tubular art, the inner end of said sleeve being rigi and having a conical exterior surface positioned wit in said annular flange and in contact with the inner surface thereof whereb lon itudinal separation of the sleeve rom t e body member will be pre-- vented. v

In testimony whereof, I hereunto aflix my signature, this 5th day of March, .1930.

ALBERT BRUNNER. 

